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Pension and Other Postretirement Benefits (Tables)
 9 Months Ended
Sep. 30, 2023
Pension Plan  
Pension Benefits  
Schedule of Components of Net Periodic Pension (Income)/Cost and Postretirement Benefit Income
The components of net periodic pension (income)/cost were as follows:
For the Quarters Ended
 September 30, 2023September 25, 2022
(In thousands)Qualified
Plans		Non-
Qualified
Plans		All
Plans		Qualified
Plans		Non-
Qualified
Plans		All
Plans
Service cost$1,417 $— $1,417 $2,882 $— $2,882 
Interest cost 14,198 2,296 16,494 8,837 1,284 10,121 
Expected return on plan assets (19,122)— (19,122)(13,807)— (13,807)
Amortization of actuarial loss 663 890 1,553 3,266 1,643 4,909 
Amortization of prior service credit (486)— (486)(486)— (486)
Net periodic pension (income)/cost$(3,330)$3,186 $(144)$692 $2,927 $3,619 
For the Nine Months Ended
 September 30, 2023September 25, 2022
(In thousands)Qualified
Plans		Non-
Qualified
Plans		All
Plans		Qualified
Plans		Non-
Qualified
Plans		All
Plans
Service cost$4,252 $— $4,252 $8,645 $— $8,645 
Interest cost 42,595 6,887 49,482 26,512 3,853 30,365 
Expected return on plan assets (57,367)— (57,367)(41,422)— (41,422)
Amortization of actuarial loss 1,991 2,669 4,660 9,799 4,929 14,728 
Amortization of prior service credit (1,459)— (1,459)(1,459)— (1,459)
Net periodic pension (income)/cost$(9,988)$9,556 $(432)$2,075 $8,782 $10,857 
Other Postretirement Benefit Plan  
Pension Benefits  
Schedule of Components of Net Periodic Pension (Income)/Cost and Postretirement Benefit Income
The components of net periodic postretirement benefit cost were as follows:
For the Quarters EndedFor the Nine Months Ended
(In thousands)September 30, 2023September 25, 2022September 30, 2023September 25, 2022
Service cost$8 $11 $25 $34 
Interest cost 375 183 1,126 548 
Amortization of actuarial loss 486 823 1,455 2,470 
Amortization of prior service credit — — — (368)
Net periodic postretirement benefit cost$869 $1,017 $2,606 $2,684